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Looking for Parts List for Astec AC8151-01 Power Supply (TRS-80 M III, Osborne)


New Member
Apr 27, 2021
This is my first post, so I hope I hit the right part of the forum - otherwise please advise :).

The title says it. Specifically I need the data for capacitor C8 (capacity and voltage). I'm in the process of getting a 1982 Model III up and running again.


Veteran Member
Mar 14, 2013
Chaffee, MO
Here is what the Repair Manual says it is:

Click image for larger version  Name:	M3-C8-Cap.png Views:	0 Size:	13.2 KB ID:	1206184
PM me with your email address and I'll send the Info I have.

Note: make sure you have a load on the +5 VDC when test the Voltages. Also the Square RIFA's
need to be replaced if they show any signs of cracking in the outer coating. If cracked they will
explode. I'll have to locate the C?? numbers, as the Print doesn't show well enough.

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